The eighth album from musical innovator Nitin Sawhney, London Undersound, will be released tomorrow, August 25th. Featuring a cast of guest contributors that includes Natty, Reena Bhardwaj, Ojos de Brujo, Anoushka Shankar, Roxanne Tataei, Tina Grace, Aruba Red, Imogen Heap, Faheem Mazhar and Paul McCartney, the album embraces a far-flung range of musical and cultural influences, to put it mildly. And yet the collection is deftly bound together by Sawhney’s masterful production, and a narrative subtext which runs through the diverse strands of music like a thread of steel.